Both dramas are about a love story between a female teacher and a male pupil.
Lesson in Love is a taiwanese drama; Hajimete Koi wo Shita Hi ni Yomu Hanashi is a japanese drama.

Both female protagonists of this drama are older than their male lovers. In both dramas there are scenes of coexistence between the protagonists.

Both female protagonists of this drama are older than their male lovers. In both dramas there are scenes of coexistence between the protagonists.

Both the protagonists of these dramas are 30 years old and start a relationship with a boy younger than them.

Both drama series are set in a high school and feature students as protagonists.
In both series the leading actor is Lomon.

Both drama series are set in a high school and feature students as protagonists.
Accidents happen, but in reality they are not accidents.

Both dramas are about life inside a prison. There is no shortage of harsh and bloody scenes and unjustly accused characters.

In both dramas there are characters who have been falsely accused of crimes they did not commit. In both dramas life inside the prison is described.

Both dramas are set in a music and arts school. The students take Zanto and dance lessons. Both dramas show the love developments between students and their relationship with adults.

both stories are based on famous artists in Japan: Kiseki is about the band Greeeen, while Little Love Song is inspired by the songs of MONGOL800.

both stories are about music and songs. Both female protagonists are talented.

both stories are about a band of boys. In both we have the death of a member of the band. The others continue to play.